Steam-generating stove for steam bathrooms



Nov. 20, 1951 B, BER OM 2,575,860

STEAM GENERATING STOVE FOR STEAM-BATHROOMS Filed Feb. e, 1946 [n venlor KWL Emmi/m0 55/9 01 1 Patented Nov. 20, 1951 STEAM-GENERATIN G STOVE FOR STEAM BATHROOMS Karl Bernhard Bergom, Honefoss, Norway Application February 6, 1946, Serial No. 645,850 In Norway October 3, 1942 Section 1, Public Law 690, August 8, 1946 Patent expires October 3, 1962 4 Claims. 1

The present invention relates to steam generating stoves for steam-bathrooms to produce hot moist air in the room. According to the present invention the stove comprises a fire box for combustible materials containing two compartments, one at each side of the fire box and adapted to receive a filling of neat accumulating material such as stone. Each compartment has an upward extension having a front opening leading to the room, passages for conducting gases of combustion in con tact with the Walls of said compartments and their extensions, first, upwards along the inside walls of same, then downwards along the outside walls of one compartment and its extension, then horizontally in a passage under the bottom of both compartments and under the ash pit and finally upwards along the outside wall of the other compartment and extension to a smoke out let. A 'tiltable damper is provided which is adapted to control and reverse the conduction of the gases, said damper being arranged under the smoke outlet and above the top of the compartment extensions. In this manner the stone fille ing and the compartments may be highly heated, and the quantity of filling may be varied according to requirements.

In large steam-bathrooms with many visitors "a great quantity of filling is preferred, but in smaller steam-bathrooms a smaller filling is more economical, the steam-bathroom being thereby more quickly heated.

An inlet for supplemental air is arranged in the passage under the bottom of the compartments, and the ash pit, means being provided for regulating said last-named inlet, a narrow vertical passage is also provided, adapted to pass preheated air from the stove top in contact with a back wall of the fire box down to the said inlet.

The drawing shows an embodiment of the invention in which Fig. l is a front view of the stove one half being shown, in vertical section.

Fig. 2 is a corresponding side view.

Fig. 3 shows a section on the line III-III in Fig. 1.

The stove has in ordinary manner a bottom grate, land'ashpit 2. At both sides thereof two vertical compartments 3 and 4 are arranged to receive the stone filling as heat accumulating substances. These compartments have front and rear walls I l, H forming parts of the stove shell or casing and continue upwards above the stone filling as indicated at Sand 6 respectively, where they are open in front (the left hand side in Fig. 1).

Between the inner walls of the compartment 3, its extension 5, and compartment 4 and its extension 6 the fire space Ha is arranged above the grate l and is extended upwards to a top space 12 which is connected at both sides with narrow vertical passages l3 and M formed between the sides I5 and I5 of the stove casing and the exterior wall of the compartments 3, 4, and their extensions 5, 6 respectively.

Primary air of combustion is introduced at 20 through the fire door 2|. 1 is a pivoted damper having a handle 24, arranged in the top space l2, and I6 is an outlet for smoke gases to the chimney. Through the front openings of the compartment extensions 5 and 6 water may be poured for instance by hand upon the hot stones, and the steam generated thereby passes up into the room. Usually only the compartments 3 and 4 are filled with stones, as shown.

The stove operates in the following manner:

The combustion gases generated from the wood on the grate 1 rise upwards and sweep along the inner sides of the compartments 3, 4. The damper 7 deflects the gases to the right downwards through the passage l3, then horizontally to the left through passage I8 under the ash pit 2 and then upwards through passage hi to outlet l6.

Thereby the compartments 3, 4 and their extensions 5, 6 will be heated from four sides, as will the stone filling. The heat of the combustion gases is consequently utilized efficiently and a substantial part of the heat is accumulated in the stone filling.

After some time the damper I is pivoted to its second position, so that the combustion gases will pass in the opposite direction, downwards in passage l4 and upwards in passage I3.

At the bottom of each of the compartments 3, 4 an air inlet opening 8 is arranged, the size of which may be regulated by suitable means (not shown), so that air from the room will pass into these openings and upwards through the stone filling so as to be heated and carry along the steam generated in the compartments.

When the damper i is in the position shown in Fig. 1, the right hand compartment 3 and stone filling are intensively heated to a high temperature, whereas the left compartment 4 is somewhat less heated. Now the damper l is tilted by means of handle 24 into the second position. whereby the heating at 4 is completed. Water is poured through front opening 5, as mentioned above is instantly evaporated and passes out into the room together with air let in at 8. This manner 3 may be continued for a suitable time, until the stone filling in 3 has been cooled to a lower temperature. During this time the temperature in 4 has highly increased and after having again readjusted the damper I backinto its first posi-, tion, the stone filling in 4 is now utilized to generate steam in the same manner as in 3'. The air in the room is gradually heated and charged with. moisture as required in bathing rooms of the mentioned kind.

Close to the rear casing wall I! of the stovea vertical narrow passage 9 is arranged, I h1s passage is open at the top as indicated in Fig. 2,

and at the bottom it is connected with a small mentin question.

In the example shown the quantity of such supplemental air-introduced under the ash pit 2 ma be regulated by the valve ill or by other suitable means,

I claim:

I. A stove for steam bathrooms to produce hot moist air comprising. a housing having a top, bottom andsidewalls: with a smoke outlet in the top, means forming two compartments in the stove opening to the exterior thereof for receiving a filling of heat accumulating material, said coinpartments being .positioned'on opposite sides of centerline of said housing and spaced from the top, bottom and two oppositely disposed side walls of said housing, a combustion chamber positioned between said compartments, and having a lower. wall spacedfrom the bottom of said housing, the spaces. between the housing lower, wall and the combustion chamber and the spaces be tween said compartments and said two oppositely V disposed sidewalls beingxin communication and forming; a circuitous passage. communicating. with the smoke outletifor conducting the gases of combustion, and a damper tilta-bl-y mounted in the upper end of said housing; in a position to block passage of gases from said combustion chamber to said .smokeoutlet in either of two end tilting positions; said; damper being? moveable between said two. tilting positions, in afirst of which it directs gases rising upwardly from said co'mbus tion. chamber in a clockwise movement through said passage to said smoke outlet, while in its second position of adjustment, the damper directs said gases-in a counterclockwise direction through said passage to said smoke outlet.

2. Alstove as set forthin'claim 1, wherein small air inlet openings are arranged at the bottom of each compartment,

3. A. stove as set forth in claim 1, wherein an inlet for supplemental air is arranged in the passage under the bottom of the compartments and the ash pit, means being provided for regulating said inlet, and a narrow vertical channel adapted to pass preheated air from the stove top in contact with a back wall of the fire box down to the said inlet.

' 4. A stove for steam bathrooms to produce hot moist air comprising a housing having a top and four sidewallswith a smoke outlet in the top, i'r'iaii forming two compartments in the said housing having pward extensions opening to the exterior or the housing for receiving a filling of heat accumulating material, said compartmerits having upper surfaces disposed adjacent to and spaced from said housing top wall, and

' also being disposed at each side of said smoke outlet and positioned on opposite sides of the centerline of said housing and said compartments extending between two oppositely disposed sidewalls of said hous-ing and spaced from the bottom and the other twooppositelydisposed sidewalls of said housing, a combustion chamber positioned between said compartments, and having a lower wallspaced from the bottom of said housing, the spaces between the housing lower wall and the combustion chamber and the spacesbetween'said compartments and said two oppositely disposed sidewalls beingi-n communication and forming a circuitous passage communicating with the smoke outlet for conducting the gases of combustion, a damper shiftably mounted on saidhousing and extending between the first mentioned oppositely disposed sidewalls and between the outlet and the top surfaces of said compartments for select ing the direction of travel of said gases in said passage, and means for shifting said damper see lectively to engage an. edge thereof with the top surface of either of said compartments while the other edge of the'damper contacts the top wall of the housing, on the opposite side of the smoke Outl'b and cail's il lg the gaSS fiSiilg upwardly fim said combustion chamber to tr avi in said passage in the dirtioii Of said opposite Side fifSt down waidly btWefi dil bf idi compartments the housing wall, tliii across the bttfji'n of Said hOliSil'i g below fih OifiEllStiGh l'litlfibei; thll upwardly in the passage between the other compaftfii'elltfi aiiq'fh housing W311, and fiiially but the smoke outlet, 7 f i KARL BERNHARI) BERZGOML REFERENCES" CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Num er Name Date 1 ,981 Backus Feb. 18, 1841 n 150,638 Vo'se May 5, 1874 2,096,649 Rasanari Oct. 19, 1-937 2,390,483 Wingert Dec. 4', 1945 2,400,901 Agricolaet a1 A Ma 22', 1 946 FOREIGN FATENTS Number Country Date 195,858 Germany sen-" ien" Feb.. 25,1908 

